The
feeling I always got from Jaybeam products was that the designers
were more interested in whether the thing would work than whether
it would sell to the ignorant. Contrast this with some of the
more flamboyant aerial designs of today, with massive reflectors,
visually impressive but functionally impotent multi-director chains,
and acres of brightly coloured plastic.

This picture shows the inside of the cable connector box of a
Jaybeam ‘Parabeam’ UHF aerial of the 1970s. The gizmo
at the bottom is a balun. The word comes from ‘balanced
to unbalanced’, since the function of the device is to match
the balanced aerial element to the unbalanced feeder. See the
following exhibit for more about the ‘Parabeam’.